I spend a lot of time at the command line, so a good terminal emulator is important to me. Unfortunately, the ones that get packaged with Linux aren't that great:
Konsole
Terrible text wrapping support, no-reflow and newlines get inserted when you cut & paste
Slow
**[Gnome Terminal](http://en.wikipedia.org/wiki/GNOME_Terminal)**
Bad text wrapping support, no re-flow
Impossible to scroll back while output is being generated
Slow
On the Mac, the built-in terminal works great. But it lacks tabs, so I end up wasting a lot of time in Expose looking for the right window.
Mac OS X Terminal
Really nice split-pane for scrollback
Perfect text wrapping
True transprency
But no tabs!
Mac OS X only!
Fortunately, I've found the perfect terminal emulator. It's fast, it's simple, and it's very easy to install:
Terminator
Unique horizontal scrolling (ideal for SQL)
Fast
Great keyboard shortcuts
Unlimited scrollback is on by default